OK, so I got some quality time on a chronograph today and answered my own question. I only fired three shots per load because I was checking a bunch of other stuff at the same time.
Temp: ~40 F.
Test rifle: Ruger M-77 Mk II with a 22" factory barrel
Federal 180-grain Fusion averaged 2,631 fps, with an extreme spread of 31.99 fps. SD was 16.49.
Federal 150-grain Fusion averaged 2,816 fps, with an extreme spread of 20.34 and SD of 10.81.
Federal 3006A (blue-box 150-grain load) averaged 2,820, with an extreme spread of 41.28 fps and a SD of 22.13.
Federal 3006B, (blue-box 180-grain load) averaged 2,652, with an extreme spread of 45.16 and SD of 24.63.
Greek HXP, the 150-grain FMJ load sold by the DCM for the M-1 Garand, averaged 2,719 fps with an extreme spread of 66.03 fps and SD of 29.06.
Okie John
